You all must be well aware by now that scientists detected gravitational waves for the first time ever a few weeks ago. You probably also know that scientists everywhere were freaking out, but now that the dust has settled, many of us are left wondering what the hell it actually means, and why we should care. That's a pretty valid question, because the whole notion of gravitational waves involves some pretty complex physics - which is why it takes someone as qualified as theoretical physicist Brian Greene to properly explain what the eff is going on.

And where better to do that than on The Late Show, where Stephen Colbert can make jokes about scientists doing Einstein's 100-year-old homework (seriously though, dude has a point).

Not only does Greene give the best explanation so far of what the gravitational wave discovery means, he actually builds a tiny laser model of the LIGO observatory in the studio to show exactly how scientists detected gravitational waves in the first place.

You've probably heard a lot about that already: you know, lasers measuring super-tiny bends in the fabric of space. But if you're like us, you're still puzzled over what that actually looks like. Well, wonder no more, because Colbert gives us a visual demonstration using sound waves, by screaming "SCIENCE" into lasers. Awesome.

We won't give too much away, because this is honestly such a beautiful, funny, and simple-to-understand demonstration of complex science that we wouldn't want you to miss it. But in the words of Greene, let's just say that "you can't block gravity", and we can't wait to use these waves to learn a whole lot more about the Universe.

ScienceAlert is promoting Brian Greene's first Australian tour this March, and you can still buy tickets here.